IEEE 802.11-24/1832r7 Stream Parser for Unequal Modulation Investigation
Explore the reuse of HT stream parser for UHR in distribution of coded bits across spatial streams based on modulation order. Detailed analysis of stream parsing methods in EHT and HT for efficient data distribution and exclusion of BPSK due to axis limitations.
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Nov 2024 doc.: IEEE 802.11-24/1832r7 Stream Parser for Unequal Modulation Date: 2024-11-09 Authors: Affiliations Address Phone email Name Qinghua Li qinghua.li@intel.com Juan Fang Shlomi Vituri Intel Assaf Gurevitz Robert Stacey Carlos Cordeiro Submission Slide 1 Qinghua Li, Intel
doc.: IEEE 802.11-24/1832r7 Nov 2024 Introduction Unequal modulation across spatial streams was introduced in HT [2] It has been revisited and adopted in UHR SFD [1] A stream parser is needed to distribute coded bits to the spatial streams according to the modulation order of each stream, respectively In this work, we investigate whether HT stream parser can be reused by UHR Submission Slide 2 Qinghua Li, Intel
doc.: IEEE 802.11-24/1832r7 Nov 2024 Stream Parser in EHT After post-FEC padding, coded bits are distributed into different spatial streams in a round robin fashion according to the modulation order If the allocated bandwidth is greater than 80 MHz, the distributed bits per stream are then distributed to each frequency segment in a round robin fashion Segment Parser Pre-FEC PHY Padding Stream Parser LDPC Encoder Post-FEC Padding Scrambler Segment Parser Submission Slide 3 Qinghua Li, Intel
doc.: IEEE 802.11-24/1832r7 Nov 2024 2-Stream Parsing in EHT s s s s s s s s s s s s The stream parsing is ? bits by ? bits, where ? is the number of bits carried by each QAM component (real or imaginary) For modulation order ?, s = max 1,log2(?) 2 where ?BPSCS log2? Submission Slide 4 Qinghua Li, Intel
doc.: IEEE 802.11-24/1832r7 Nov 2024 HT Stream Parser Submission Slide 5 Qinghua Li, Intel
doc.: IEEE 802.11-24/1832r7 Nov 2024 2-Stream Parsing in HT ????= max 1,log2(????) For modulation order ????, ???= 1,2, ?BPSCS(???) log2???? 2 s1 s1 s1 s2 s2 s1 s1 s2 s1 s2 s2 s2 Submission Slide 6 Qinghua Li, Intel
doc.: IEEE 802.11-24/1832r7 Nov 2024 Exclusion of BPSK from UEQM BPSK has only one axis, the real axis, while the other QAMs has two axes The per-axis round-robin parsing can t be applied to BPSK without modification [3] For implementation simplicity, it is desired that BPSK is excluded from UEQM Submission Slide 7 Qinghua Li, Intel
doc.: IEEE 802.11-24/1832r7 Nov 2024 Reuse of HT Stream Parser for UHR UEQM with Slight Modifications Reuse HT stream parser for UHR UEQM with the following restrictions and extension 2 ?SS 4 2 ?BPSCS?SS 12, for ?SS= 1,2, ,?SS The encoder type is LDPC [1] Include 4K QAM and exclude BPSK Submission Slide 8 Qinghua Li, Intel
doc.: IEEE 802.11-24/1832r7 Nov 2024 Summary Propose to reuse HT stream parser for UHR UEQM with slight modifications Submission Slide 9 Qinghua Li, Intel
doc.: IEEE 802.11-24/1832r7 Nov 2024 Reference [1] 11-24-0209-06-00bn-specification-framework-for-tgbn, Ross Jian Yu [2] IEEE Std 802.11 2020 [3] 11-24-1451-02-00bn-ueqm-transmission-over-spatial-streams, Ying Wang Submission Slide 10 Qinghua Li, Intel
doc.: IEEE 802.11-24/1832r7 Nov 2024 SP 1 Do you support to add the following to UHR SFD? Exclude BPSK from UHR UEQM. Y: N: A: Submission Slide 11 Qinghua Li, Intel
doc.: IEEE 802.11-24/1832r7 Nov 2024 SP 2 Do you support to add the following to UHR SFD? Include 4K QAM in UHR UEQM. Y: N: A: Submission Slide 12 Qinghua Li, Intel
doc.: IEEE 802.11-24/1832r7 Nov 2024 SP 3 Do you support to add the following to UHR SFD? add the following to UHR SFD? Reuse HT stream parser for UHR UEQM with the following restrictions and extension 2 ?SS 4 2 ?BPSCS?SS 12, for ?SS= 1,2, ,?SS The encoder type is LDPC Y: N: A: Submission Slide 13 Qinghua Li, Intel
doc.: IEEE 802.11-24/1832r7 Nov 2024 SP 4 Do you support to add the following to UHR SFD? For equal modulation, UHR stream parser remains the same as EHT. Y: N: A: Submission Slide 14 Qinghua Li, Intel
doc.: IEEE 802.11-24/1832r7 Nov 2024 SP 5 Do you support to add the following to UHR SFD? For bandwidths greater than 80 MHz, the coded bit parsing of UHR is stream parsing first followed by segment parsing. Y: N: A: Submission Slide 15 Qinghua Li, Intel
doc.: IEEE 802.11-24/1832r7 Nov 2024 SP 6 Do you support to add the following to UHR SFD? Reuse HT stream parser in Slide 5 with the modifications in Slide 8 for UHR UEQM. Y: N: A: Submission Slide 16 Qinghua Li, Intel
